– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 4 am Sun 13 Sep Local Time
Updates in:
Update imminent hr min s
Issued: 4 am Sun 13 Sep Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryLight rain (total 3mm), mostly falling on Sun afternoon. Very mild (max 18°C on Tue afternoon, min 10°C on Sun night). Wind will be generally light. | Days 4–6 Weather SummaryMostly dry. Warm (max 25°C on Thu afternoon, min 14°C on Wed morning). Wind will be generally light. | |||||||||||||||||
Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | | | |  | |  |  | | | | | | | | | |
light rain | rain shwrs | rain shwrs | rain shwrs | light rain | rain shwrs | some clouds | some clouds | clear | clear | clear | clear | clear | clear | clear | clear | clear | clear | |
Cloud base (m) | 650 | 700 | 800 | 1600 | 950 | 3550 | 2000 | 2150 | 8950 | |||||||||
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | 0.6 | 0.8 | 0.6 | 0.1 | 0.4 | 0.1 | — | — | — | — | — | — | — | — | — | — | — | — |
max °C | 12 | 12 | 11 | 13 | 14 | 12 | 15 | 18 | 14 | 19 | 22 | 17 | 23 | 25 | 19 | 19 | 22 | 16 |
min °C | 11 | 12 | 10 | 10 | 13 | 11 | 11 | 16 | 12 | 14 | 22 | 17 | 18 | 24 | 15 | 16 | 21 | 15 |
chill °C | 11 | 12 | 10 | 10 | 13 | 11 | 11 | 16 | 12 | 14 | 22 | 17 | 18 | 24 | 15 | 16 | 21 | 15 |
Freezing level m | 2500 | 2650 | 2800 | 3250 | 2900 | 2750 | 2650 | 2900 | 3550 | 3900 | 4050 | 4100 | 4050 | 4000 | 3950 | 3950 | 3900 | 4050 |
 | 6:41 | — | — | 6:41 | — | — | 6:43 | — | — | 6:45 | — | — | 6:46 | — | — | 6:48 | — | — |
 | — | 7:24 | — | — | 7:22 | — | — | 7:21 | — | — | 7:19 | — | — | 7:16 | — | — | 7:14 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Light rain (total 3mm), mostly falling on Sun afternoon. Very mild (max 18°C on Tue afternoon, min 10°C on Sun night). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Mostly dry. Warm (max 25°C on Thu afternoon, min 14°C on Wed morning). Wind will be generally light.
This table gives the weather forecast for South Twin Sister at the specific elevation of 500 m. Our advanced weather models allow us to provide distinct weather forecasts for several elevations of South Twin Sister. To see the weather forecasts for the other elevations, use the tab navigation above the table. For a wider overview of the weather, consult the Weather Map of Washington.
| Weather Station | Temp. | Weather | Wind | Gusts | Cloud / Visibility |
|---|---|---|---|---|---|
 | |||||
Bellingham Airport |  | ||||
SHIP3071 | |||||
SHIP9775 |
* NOTE: not all weather observatories update at the same frequency which is the reason why some locations may show data from stations that are further away than known closer ones.